toJson method
Implementation
core.Map<core.String, core.dynamic> toJson() => {
if (oldestAllowedPriceVersionTime != null)
'oldestAllowedPriceVersionTime': oldestAllowedPriceVersionTime!,
if (priceIncreaseType != null) 'priceIncreaseType': priceIncreaseType!,
if (regionCode != null) 'regionCode': regionCode!,
};